Example usage for com.google.common.base Optional orNull

Introduction

In this page you can find the example usage for com.google.common.base Optional orNull.

Prototype

@Nullable
public abstract T orNull();

Source Link

Document

Returns the contained instance if it is present; null otherwise.

Usage

From source file:zipkin.autoconfigure.storage.elasticsearch.http.ZipkinElasticsearchHttpStorageAutoConfiguration.java

public static Optional<String> regionFromAwsUrls(List<String> hosts) {
    Optional<String> awsRegion = Optional.absent();
    for (String url : hosts) {
        Matcher matcher = AWS_URL.matcher(url);
        if (matcher.find()) {
            String matched = matcher.group(1);
            checkArgument(awsRegion.or(matched).equals(matched), "too many regions: saw '%s' and '%s'",
                    awsRegion, matched);
            awsRegion = Optional.of(matcher.group(1));
        } else {/*w w w  .  j a  v  a  2s. co  m*/
            checkArgument(!awsRegion.isPresent(), "mismatched regions; saw '%s' but no awsRegion found in '%s'",
                    awsRegion.orNull(), url);
        }
    }
    return awsRegion;
}

From source file:com.twitter.common.args.ArgumentInfo.java

/**
 * Extracts the {@code Arg} from the given field.
 *
 * @param field The field containing the {@code Arg}.
 * @param instance An optional object instance containing the field.
 * @return The extracted {@code} Arg.//from  w  w  w . j a v a  2s .c  om
 * @throws IllegalArgumentException If the field does not contain an arg.
 */
protected static Arg<?> getArgForField(Field field, Optional<?> instance) {
    Preconditions.checkArgument(field.getType() == Arg.class,
            "Field is annotated for argument parsing but is not of Arg type: " + field);
    Preconditions.checkArgument(Modifier.isStatic(field.getModifiers()) || instance.isPresent(),
            "Non-static argument fields are not supported, found " + field);

    field.setAccessible(true);
    try {
        return (Arg<?>) field.get(instance.orNull());
    } catch (IllegalAccessException e) {
        throw new RuntimeException("Cannot get arg value for " + field);
    }
}

From source file:org.opendaylight.protocol.pcep.pcc.mock.spi.MsgBuilderUtil.java

public static Lsp createLsp(final long plspId, final boolean sync, final Optional<Tlvs> tlvs,
        final boolean isDelegatedLsp, final boolean remove) {
    final LspBuilder lspBuilder = new LspBuilder();
    lspBuilder.setAdministrative(true);//www .j a v  a2  s.com
    lspBuilder.setDelegate(isDelegatedLsp);
    lspBuilder.setIgnore(false);
    lspBuilder.setOperational(OperationalStatus.Up);
    lspBuilder.setPlspId(new PlspId(plspId));
    lspBuilder.setProcessingRule(false);
    lspBuilder.setRemove(remove);
    lspBuilder.setSync(sync);
    lspBuilder.setTlvs(tlvs.orNull());
    return lspBuilder.build();
}

From source file:zipkin.autoconfigure.storage.elasticsearch.aws.ZipkinElasticsearchAwsStorageAutoConfiguration.java

static Optional<String> regionFromAwsUrls(List<String> hosts) {
    Optional<String> awsRegion = Optional.absent();
    for (String url : hosts) {
        Matcher matcher = AWS_URL.matcher(url);
        if (matcher.find()) {
            String matched = matcher.group(1);
            checkArgument(awsRegion.or(matched).equals(matched), "too many regions: saw '%s' and '%s'",
                    awsRegion, matched);
            awsRegion = Optional.of(matcher.group(1));
        } else {/*w w  w . j av  a  2 s.  c  o  m*/
            checkArgument(!awsRegion.isPresent(), "mismatched regions; saw '%s' but no awsRegion found in '%s'",
                    awsRegion.orNull(), url);
        }
    }
    return awsRegion;
}

From source file:org.locationtech.geogig.spring.service.AbstractRepositoryService.java

public Repository getRepository(RepositoryProvider provider, String repoName) {
    Optional<Repository> geogig = provider.getGeogig(repoName);
    return geogig.orNull();
}

From source file:org.onos.yangtools.yang.data.impl.codec.Int8StringCodec.java

protected Int8StringCodec(final Optional<IntegerTypeDefinition> typeDef) {
    super(typeDef, extractRange(typeDef.orNull()), Byte.class);
}

From source file:org.onos.yangtools.yang.data.impl.codec.Int16StringCodec.java

protected Int16StringCodec(final Optional<IntegerTypeDefinition> typeDef) {
    super(typeDef, extractRange(typeDef.orNull()), Short.class);
}

From source file:org.onos.yangtools.yang.data.impl.codec.Int32StringCodec.java

protected Int32StringCodec(final Optional<IntegerTypeDefinition> typeDef) {
    super(typeDef, extractRange(typeDef.orNull()), Integer.class);
}

From source file:org.onos.yangtools.yang.data.impl.codec.Int64StringCodec.java

protected Int64StringCodec(final Optional<IntegerTypeDefinition> typeDef) {
    super(typeDef, extractRange(typeDef.orNull()), Long.class);
}

From source file:org.opendaylight.yangtools.yang.data.impl.codec.Int16StringCodec.java

Int16StringCodec(final Optional<IntegerTypeDefinition> typeDef) {
    super(typeDef, extractRange(typeDef.orNull()), Short.class);
}